Building Serverless Microservices with AWS

© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Donnie Prakoso, MSc
AWS Technology Evangelist, ASEAN
Building Serverless Microservices
AWS User Group Meetup
@donnieprakoso

Hello, World.
Donnie Prakoso, MSc
AWS Technology Evangelist, ASEAN
@donnieprakoso
donnieprakoso
• Speak in Go and Python
• Machine Learning and Serverless
• I AWS User Groups

© 2018, Amazon Web Services, Inc. or Its Affiliates. All rights reserved.
Let’s Discuss Something
• What is microservices and why we
should consider to adopt it?
• What are the options we have to
implement it?
• How can we build, deploy and
coordinate microservices?

© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
What Is Microservices?

What Is Microservices?
An approach to developing a single application as a suite of
small services, each running in its own process and
communicating with lightweight mechanisms, often an HTTP
resource API
- Martin Fowler & James Lewis
https://martinfowler.com

Monolithic vs. Microservices
webserver
.package
Order UI
Order service
Inventory
service
Shipping
service
Order
UI
Inventory
service
Order
service
Shipping
service

Image credits: Ikea

Tenets of Microservices Architectures
Do one
thing wellIndependent
Decentralized
Black box
Polyglot
You build it, you run it

© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.© 2017, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Demo

Benefits of Microservices Architecture
Agility
Flexible
scaling
Easy
deployment
Technology
freedom
Reusable code
Resilience

What Are Our Options?
Amazon EC2 Amazon ECS AWS Lambda
INSTANCES CONTAINERS SERVERLESS

Serverless Means …
No servers to provision
or manage
Scales with usage
Never pay for idle Built in availability and
fault tolerance

Focus on building business logic.
!

Services for Building Serverless Applications
AWS Lambda
Amazon DynamoDB
Amazon SNS
Amazon API Gateway
Amazon SQS
Amazon Kinesis
Amazon S3
Compute and API Proxy
AWS X-Ray
AWS Step Functions
Datastores, Storage, Orchestration, Analytics, Interprocess Messaging
Developer Tools
AWS CodeBuild
AWS CodePipeline
AWS Serverless
Application Model (SAM)
Open Source and
third parties
Lambda@Edge
AWS Cloud9
Amazon Aurora
Serverless (preview)
AWS AppSync

Common Serverless Application Use Cases
Web
applications
• Static
websites
• Complex web
apps
• Packages for
Flask and
Express
Data
processing
• Real-time
• MapReduce
• Batch
• Machine
learning
inference
Chatbots
• Powering
chatbot logic
Backends
• Apps and
services
• Mobile
• IoT
</></>
Amazon
Alexa
• Powering
voice-enabled
apps
• Alexa
Skills Kit
IT
automation
• Policy engines
• Extending
AWS services
• Infrastructure
management

Using AWS Lambda
Bring your own code
• Node.js, Java, Python,
C#, Go
• Bring your own libraries
(even native ones)
Simple resource model
• Select power rating from
128 MB to 3 GB
• CPU and network
allocated proportionately
Flexible use
• Synchronous or
asynchronous
• Integrated with other
AWS services
Flexible authorization
• Securely grant access to
resources and VPCs
• Fine-grained control for
invoking your functions

Using AWS Lambda
Authoring functions
• WYSIWYG editor or
upload packaged .zip
• AWS Cloud9 IDE
• Third-party plugins
(Eclipse, Visual Studio)
Monitoring and logging
• Metrics for requests,
errors, and throttles
• Built-in logs to Amazon
CloudWatch Logs
• Distributed tracing with
AWS X-Ray
Programming model
• Use processes, threads,
/tmp, sockets normally
• AWS SDK built in
(Python and Node.js)
Stateless
• Persist data using
external storage
• No affinity or access to
underlying infrastructure

Serverless is a relatively better fit
for microservices.
!

Development and Deployment.
1

AWS Serverless Application Model (SAM)
Simplified template driven deployment
model for serverless applications
Supported serverless resource types:
functions, APIs, and tables
Supports anything AWS CloudFormation
supports
Open specification (Apache 2.0)
https://github.com/awslabs/serverless-application-model

SAM Template
Tells CloudFormation this is a SAM
template it needs to transform
Creates a Lambda function with the
referenced managed IAM policy,
runtime, code at the referenced zip
location, and handler as defined.
Also creates an API Gateway and
takes care of all
mapping/permissions necessary
Creates a DynamoDB table with five
read & write units
AWSTemplateFormatVersion: '2010-09-09’
Transform: AWS::Serverless-2016-10-31
Resources:
GetHtmlFunction:
Type: AWS::Serverless::Function
Properties:
CodeUri: s3://sam-demo-bucket/todo_list.zip
Handler: index.gethtml
Runtime: nodejs4.3
Policies: AmazonDynamoDBReadOnlyAccess
Events:
GetHtml:
Type: Api
Properties:
Path: /{proxy+}
Method: ANY
ListTable:
Type: AWS::Serverless::SimpleTable

SAM commands—package & deploy
Package
•Creates a deployment package (.zip file)
•Uploads deployment package to an Amazon S3 bucket
•Adds a CodeUri property with S3 URI
Deploy
•Calls AWS CloudFormation ‘CreateChangeSet’ API
•Calls AWS CloudFormation ‘ExecuteChangeSet’ API

AWS SAM CLI
CLI tool for local testing of serverless apps
Works with Lambda functions and “proxy-
style” APIs
Response object and function logs
available on your local machine
Uses open source docker-lambda images
to mimic Lambda’s execution environment:
• Emulates timeout, memory limits,
runtimes
https://github.com/awslabs/aws-sam-local

Integration with AWS Services.
2

Amazon API Gateway
Create a unified
API frontend for
multiple
microservices
Authenticate and
authorize
requests to a
backend
DDoS protection
and throttling
for your backend
Throttle, meter,
and monetize
API usage by
third-party
developers

Serverless Applications
Services (anything)
Changes in
data state
Requests to
endpoints
Changes in
resource state
Event source Lambda function
Node.js
Python
Java
C#
Go

Amazon S3 Amazon
DynamoDB
Amazon
Kinesis
AWS
CloudFormation
AWS CloudTrail Amazon
CloudWatch
Amazon
Cognito
Amazon SNSAmazon
SES
Cron events
DATA STORES ENDPOINTS
CONFIGURATION REPOSITORIES EVENT/MESSAGE SERVICES
Example event sources that trigger AWS Lambda
… and a few more with more on the way!
AWS
CodeCommit
Amazon
API Gateway
Amazon
Alexa
AWS IoT AWS Step
Functions

Lambda execution model
Synchronous
(push)
Asynchronous
(event)
Stream-based
Amazon
API Gateway
AWS Lambda
function
Amazon
DynamoDBAmazon
SNS
/order
AWS Lambda
function
Amazon
S3
reqs
Amazon
Kinesis
changes
AWS Lambda
service
function

AWS Secrets Manager
Rotate secrets safely Secure and audit
secrets centrally
Manage access with
fine-grained policies
Easily rotate, manage, and retrieve database credentials, API keys, and
other secrets through their lifecycle

Microservices Coordination
3

AWS Step Functions
Easily coordinate multiple Lambda functions using visual
workflows
Visualize in the
console
Define in JSON Monitor
executions

State Example: Task

State Example: Choice

State Example: Succeed / Fail

State Example: Pass

State Example: Wait

State Example: Parallel

Benefits of Step Functions Orchestration
Change and add steps
without writing code
to evolve applications
and innovate faster
Coordinate and visualize
Lambda functions as a
series of steps to quickly
create serverless apps
Automatically trigger and
track each step at scale
and handle errors with
built-in retry and fallback
Productivity AgilityResilience

Quiz
AWS
? ?
?
Credential
?
Static Website
User

Build On!
Donnie Prakoso
@donnieprakoso

Building Serverless Microservices with AWS

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